Fix pylint warnings

.pylintrc

@@ -1,5 +1,5 @@
 [MESSAGES CONTROL]
-disable=invalid-name, missing-docstring, locally-disabled, unbalanced-tuple-unpacking,no-else-return,fixme,duplicate-code,cyclic-import
+disable=invalid-name, missing-docstring, locally-disabled, unbalanced-tuple-unpacking,no-else-return,fixme,duplicate-code,cyclic-import,import-outside-toplevel
 
 [SIMILARITIES]
 min-similarity-lines=5

libagent/gpg/keyring.py

@@ -173,9 +173,7 @@ def sign_digest(sock, keygrip, digest, sp=subprocess, environ=None):
     assert communicate(sock, 'PKSIGN') == b'OK'
     while True:
         line = recvline(sock).strip()
-        if line.startswith(b'S PROGRESS'):
-            continue
-        else:
+        if not line.startswith(b'S PROGRESS'):
             break
     line = unescape(line)
     log.debug('unescaped: %r', line)

libagent/ssh/__init__.py

@@ -78,8 +78,7 @@ def create_agent_parser(device_type):
     p.add_argument('--version', help='print the version info',
                    action='version', version=versions)
 
-    curve_names = [name for name in formats.SUPPORTED_CURVES]
-    curve_names = ', '.join(sorted(curve_names))
+    curve_names = ', '.join(sorted(formats.SUPPORTED_CURVES))
     p.add_argument('-e', '--ecdsa-curve-name', metavar='CURVE',
                    default=formats.CURVE_NIST256,
                    help='specify ECDSA curve name: ' + curve_names)

libagent/util.py

@@ -242,7 +242,7 @@ def which(cmd):
         from shutil import which as _which
     except ImportError:
         # For Python 2
-        from backports.shutil_which import which as _which  # pylint: disable=relative-import
+        from backports.shutil_which import which as _which
     full_path = _which(cmd)
     if full_path is None:
         raise OSError('Cannot find {!r} in $PATH'.format(cmd))